Get to know all you need about diamond – the history, facts, quality factors, treatments, imitations and much more here at GIA.

Diamond’s splendor has been appreciated for centuries, but there was not much scientific knowledge about it before the twentieth century. Since then, diamond knowledge has grown …

Diamond forms under high temperature and pressure conditions that exist only within a specific depth range (about 100 miles) beneath the earth’s surface. Diamond’s crystal structure is …

The 4Cs describe the individual qualities of a diamond, and the value of an individual diamond is based on these qualities. The terms that people use to discuss the 4Cs have become part of …

Diamond stands at the apex of the hardness scale with a value of 10. It also has the highest thermal conductivity and the highest molar density of any terrestrial material, as well as a high …

While choosing a diamond is a very personal decision, evaluating a diamond should always be a matter of precision. At GIA, we are incredibly proud that our 4Cs of diamond quality continue …

May 3, 2024 · Examines new developments in the story of diamond formation and their extraction from the earth.

Fancy Color Diamond Dazzling brilliance. Captivating color. These are the planet’s most valued gems.

The origin of a natural diamond. Forming the hardest natural mineral on earth. Billions of years ago, 100 miles (161 km) or more in the mantle of the earth, pressure, heat and carbon atoms …

A diamond’s journey is every bit as fascinating as its sparkle. GIA’s Diamond Origin and its related resources help you tell the story of the people in the country who brought you your diamond …